(Effective in the first quarter of 2007, the 3:2:2 report was modified to allow the WIC and FCM programs to use the same age range criteria of 12 to 18 months.)

The line labeled "3:2:2" shows the proportion of children between 12 and 18 months of age who were active in the WIC program and had received:

3 doses of diphtheria, pertussis and tetanus vaccine;

2 doses of oral polio vaccine; and

2 doses of Haemophilus influenzae type B vaccine.

The line labeled "4:3:3:1" shows the proportion of children between 24 and 36 months of age who had received:

4 doses of diphtheria, pertussis and tetanus vaccine;

3 doses of oral polio vaccine;

3 doses of Haemophilus influenzae type B vaccine; and

1 dose of measles, mumps and rubella vaccine.

Since 2000, the proportion of fully-immunized one-year-olds (3:2:2) increased from 70 percent to over 84 percent and the proportion of fully immunized two-year-olds (4:3:3:1) increased from 56 percent to almost 78 percent.